Can-tester.



S. TBVANDER..

GAN TESTER.

PPLIATION FILED MAY14-.,191(\. 1,087,017 4;, .Patented Feb. 10, 1914-M 4 2 SHEETS-SHEET 1.

Fig 1 s'. TEVANDBR.

GAN TES-TBP..

1,687,074. APPLICATION FILED MAYl'l, 1910 Fggg Patented Feb. 10, 1914A 2 SHEETS-SHEET 2.

Ill

UNITED STATES PATENT FFTCE.

SWAN TEVANDER, OF MAYWOOD, ILLINOIS.

CAN-TESTER.

To (4U 'whom it may conce/n Be it known that 1SwaN TuvANDnn, a citizen of the United States, residing in Maywood, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Can-Testers, of which the following is a specification. y

My invention relates to improvements in can testers.

The object of my invention is to provide a pneumatic or compressed air can tester of a simple, eiiclient and durable construction, which will operate with great certainty, delicacy and accuracy in automatically testing and separating imperfect or leaky cans fronrthe hermetically tight or perfect ones.

My invention consists in connection with a movable carrier furnished with a plurality of sealing beads or pads and a plurality of movable chucks or clamps for clamping the cans against the sealing pads or heads, mcansfor supplying and admitting com pressed air througltl1esealing heads into the cans, each ofthe sealing heads being furnished with a movable piston or device for actuating an electric switch, a switch, a movahle device for separating the 4perfect from the leaky cans' by controlling the point or place of discharge ofthe cans from the carrier, and an electromagnet in a circuit opened and closed by said switch for'operating the can separating or discharging device, according as the can isa .leaky or a perfect one` My invention also consists in the novel construction of parts and devices and in the novel combination of parts and devices herein shown and described and more particularly specied in the claims.

In the accompanying drawingforming a part of this specification, Figure 1 is a side clevation, partly in central, vertical section of a can testing machine embodying my invention; Fig. 2 is an enlarged detail sec# tion through one of the sealing heads and showing the electric switch. closed to cause the canI separating or discharging device to be operated by the electromagnet. Fig.' 3 is a detail section on the line 3--3 of Fig. Z and Fig. 4 illustrates a modification in which a weighted .switch is employed instead ofa spring switch. Fig. 5 is a detail section through the compressed air stems and Fig. 6 is a detail sectionon line 6 -6 of Fig. 1.

Specification cf Letters Patent.

Application filed May 14, 1910.

Patent ee ree. 1o, m14..

Serial No. 561,319.

In the drawing, l represents the frame of the machine, 2 a movable carrier, preferably a rotary one, 3 a con'ipressed air drum O r wheel secured to the shaft 'i of the carrier and revolving therewith, 5 a con'ipresscd air supply pipe, (5 a rotary compressed air `supply drum or wheel mounted on a revolving sleeve `or shaft 7, having a gear 8 meshing -with a gear 9 on the carrier shaft Ll, the compressed air supply wheel or drum (i peripherally engaging the side face of the wheel or drum 3, and said drums 3 and 6 .being furnished with interengaging ports rounded by the drum or wheel 6, and the valve l()a preferably has a stem 10" adapted to engage in an arm 11" carried by bracket 7a carrying the wheel or drum 6.

The carrier Q is furnished with a plurality of sealing heads or pads 12, cach preferably of rubber or any suitable material, and fitted in a flanged disk 13. on a stem or block 14, having a passage 15 connected,

by a nipple 16, pipe l? and nipple 18, with Vthe compressed air drum 3, said passage 15 communicating through the, opening 19 in the sealing pad 12 with the interior ot the can 20 which is clamped against the pad 12 by the opposing movable can chuck or clamp 2l', also mounted on the carrier 2. Each of the sealing heads or pads 12 `or its stem 14 1 is-also furnished Wit a closed chamber 2Q having a movable piston or device 23 to which is secured a pin 24 carrying an antifriction roller 25, adapted to engage and operate the electric switchQG. The chamber 22 of the sealing head communicates through one or more small holes or ports Q7 with the interior of the can through the scaling head 12. The piston is furnished with guide p ins Q8.

The movable can clamp or chuck .21 has a stem 30 adapted to reciprocate in a suitable bearing 31 on a bracket or arm 32 on the carrier 9,. The can clamp or chuck 21 may be reciprocated or opened and closed by any suitable meansto clamp the cans against lever and link 33, 34 is employed for this .spring secured to a stud 36 on the frame of the machine and it is provided with a tension adjusting or regulating screw 37 which -may be adjusted so as to require any desired amount of pressure to be exerted inside the can in order to operate the switch 'or move it suiliciently to make contact with the opposing contact point 38 of the elec tric circuit 39. This electric switch, however, may if preferred be furnished with an adjustable weight 40, as shown in Fig. 4 to regulate the amount of pressure required to close the switch. An electromagnet 41 is included in the electric circuit 39 and operates the movable can separating or discharging device 42,*the same preferably consisting of a movable arm or lever carrying theA armature of the magnet and adapted to be moved thereby into position to cause the can clamp 21 to be released, according as the can is a perfect or a leaky one.

In operation, if the can is perfect so that no compressed air escapes from the can clamped between the sealing head and the can clamp or chuck 21, the compressed air` in the small chamber 22, acting against the piston 23, will exert sufiicient pressure against the switch 26 to close the electric circuit and thus cause the electromagnet to move the can separating or discharging device 42- into position for engagement with the arm of the toggle lever and thus unclamp the can from the sealing head and permit the perfect can to be discharged from the carrier. If, however, the can is 4an imper# feet or leaky one, the pressure against the piston 23 in the small chamber 22 will not be sufficient to cause it to move the switch 26, the tension of which is accurately adj use' ed to any desired amount of air pressure-in the can to cause it to close the electric circuit; and as a consequence, the imperfect can will pass the can separating or discharging device 42y where the perfect cans are 4discharged and be carried farther around on the carrier until the arm of the toggle lever 3b engages the releasing or discharging de`Y vice 43 for the leaky or imperfect cans.

I prefer, as illustrated in the drawing, 'to

' cause themovable or electromagnet 'actuated can discharging device 42 to discharge the perfect cans instead ofthe' leaky ones, although my invention is not limited lto this particular arrangement.

,I claimz. l- .l 1. In acan testing machine, the combina- 'tlon of'a movable `carrler having a plurality of can sealing heads and a plurality of opl'posing can clamps, of means for admitting compressed air into the cans through the sealing heads, each of the sealing heads having means for actuating an electric switch by pressure of air in the can clamped thereagainst, an electricswitch, an electromagnet in the circuit cont-rolled by said switch for controlling a can discharging device to separate perfect and imperfect cans,- and means for regulating the pressure required to operate said switch to close said circuit, substantially as specified. l

2. The combination with a rotary carrier having a plurality of sealing heads and can clamps, each of said sealing heads having a chamber communicating therewith provided with a movable device for actuating an,electric switch, an electric switch, an electric circuit and magnet controlled by said switch and a movable device controlled by said magnet for causing the release or discharge of cans from said clamps as the carrier rotates, a compressed air drum on said carrier communicating with the scaling heads and a compressed air supply drum peripherally engaging the side face of said first mentioned -drum for delivering compressed air thereto as the carrier rotates, substantially as specified. a

3. The combination with a rotary carrier having a' plurality of sealing heads and can clamps, each of said sealing heads having a chamber communicating therewith provided Awith a Vmovable device for actuating an electric switch, an electricA switch, an electric circuit containing said switch and an electromagnet, and said magnet controlledl by said switch, and a movable device controlled byvsaid magnet for causing the release or discharge of cans from said clamps as the carrier rotates, a compressed air drum on saidcarrieranda compressed air supply drum peripherally engaging the side face of said rst mentioned drum for de- `livering.compressed air thereto as the carrier rotates, said drums having interengaging valves registering with each other as the l drums rotate, substantially as specified.

4. In a can testing machine, the combinaf' tion with a rotary carrier havlng a plural- .ity of can sealing heads and opposing can clamps'mountedV thereon, a; compressed air drum mounted on ysaid carrierand commumcatmg W1th said seallng lheads and a rc.;

tary compressed' airfsupply drum peripherf" ally lengaging said first mentioned drumjand gever-ing air thereto, substantially as speci'- 5. Ina can .testing machine,tlie combina# tionwith a rotary. carrier having aplurality 0f can 'sealingjeads and opposing can clamps 'mounted thereon, 'a compressedpair drum 'mountedvcnf-sad `carrier and commu- 'meeting elly engaging Selci willi said Sealing 'heads wry imprese-ed air supply drum peuplierA first mentioned dimm, Smid mms having inte'engeging valves wieg/)teni te ne epened :is the drums evolve eegetlier, substemeielly es speeied.

'6. A @Riesling 'machine including, in eomoineion: e movable euri-:ier having e pliu'ality ef een. Sealing heads and a pluralif; o opposing een clamps; means for admiting; @empi-esseri eil into the cans tliifeugli the sealing heads; an eleeiie swiieli eetieiairy relatively to seid ceiriei'; a can iiseliaigging device located adjacent Said carrier; mi electric circuit controlled by said switch, said circuit having' ineluile therein e, magnet for operating a can discharging device; sind means on eee-L of said seeling heads lm'ectu'aing the said electric switch,

seid miams being governed by the pressure of the air in the can clamped against ille sealing heed, substantially as specified.

7. A can testi-ng machine including, in combination: a movable Carrier, having a plurality ei? can sealing' heads und a plurality of eopeyatiiig een clamps, each of said sealing headsibeing pi'mfidecl with means 'fior aehuaiiug :in electric switch, Said ineens being governed by the `l'uesem'e of nix' in u l clamped can; means 'for admitting 00m- 1 pressed sii' into the @uns through the sealing heads; and en eleetiie switch stationary with lespect to Seial emfriei' and adapted to be `opesiied successively by ille Suid devices on the sealing bende, subeizmtially es specii fied.

SWAN TEVANDER. i Vitiiesses:

H. lvi. MUNDAY,

Emmy Ancona 

